staging: vt6656: sparse fixes: iwctl_siwgenie use memcpy.

extra is in kernel space replace copy_from_user with
memcpy with no need to error check.

We already know that extra is valid by error checking
on wrq->length.

sparse warning
iwctl.c:1567:53: warning: incorrect type in argument 2 (different address spaces)
iwctl.c:1567:53:    expected void const [noderef] <asn:1>*from
iwctl.c:1567:53:    got char *extra

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/staging/vt6656/iwctl.c b/drivers/staging/vt6656/iwctl.c
index 058df6516784..bf5687708e18 100644
--- a/drivers/staging/vt6656/iwctl.c
+++ b/drivers/staging/vt6656/iwctl.c
@@ -1564,10 +1564,8 @@ int iwctl_siwgenie(struct net_device *dev, struct iw_request_info *info,
                         goto out;
                 }
                 memset(pMgmt->abyWPAIE, 0, MAX_WPA_IE_LEN);
-                if (copy_from_user(pMgmt->abyWPAIE, extra, wrq->length)) {
-                        ret = -EFAULT;
-                        goto out;
-                }
+
+                memcpy(pMgmt->abyWPAIE, extra, wrq->length);
                 pMgmt->wWPAIELen = wrq->length;
         } else {
                 memset(pMgmt->abyWPAIE, 0, MAX_WPA_IE_LEN);